SmogRank / World / United States / Kentucky / April 2026
Most polluted cities in Kentucky, United States, April 2026
17 cities in Kentucky, United States ranked by their average PM2.5 over the 30 days. Worst: Flatwoods at 11.0 µg/m³, #780 of 2,914 cities in the world. Cleanest: Highland Heights at 5.9. A city needs measurements on 70% of the days to be ranked.
Ranked by unhealthy days: the share of each city's measured days with a daily mean over 35.4 µg/m³ (US AQI 101+), Unhealthy for Sensitive Groups or worse on the US EPA's scale. Ties go to the higher average.
- 1Flatwoods 0%
- 2Ashland 0%
- 2Middlesboro 0%
- 4Louisville 0%
- 5Valley Station 0%
- 6Owensboro 0%
- 7Somerset 0%
- 8Hazard 0%
- 9Jeffersontown 0%
- 9Saint Matthews 0%
- 11Elizabethtown 0%
- 12Nicholasville 0%
- 12Oak Grove 0%
- 14Paducah 0%
- 14Lexington-Fayette 0%
- 14Pikeville 0%
- 17Highland Heights 0%
The US EPA's Air Quality Index for PM2.5 (2024 breakpoints). Show values as: µg/m³ · US AQI · India AQI · China AQI · European AQI · UK DAQI · Canada AQHI+. About the scales
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SmogRank, most polluted cities in Kentucky, United States, PM2.5, April 2026, smogrank.com/us/region/kentucky/history/2026-04 (accessed 7 Oct 2026).
You're welcome to reuse a single chart, image or figure with this citation and a link. Terms. Raw monitor readings in bulk are published by OpenAQ, under each provider's licence.